Grinding-mill.



A. L. BAUSMAN.

GRINDING MILL.

APPLICATION FILED AUG.11, 1911.

Patented Aug. 13, 1912.

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A. L. BAUSMAN.

GRINDING MILL.

APPLICATION FILED AUG. 11, 1911.

Patented Aug; 13, 1912.

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WITNESSES.-

ATTORNEY.

A. L. BAUSMAN.

GRINDING MILL.

APPLICATION FILED AUG. 11, 1911.

Patented Aug. 13', 1912.

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%M-M-r ATTORNEY.

UNITED STATES PATENT OFFICE.-

ALONZO LINTON BAUSMAN, or CHIGOPEE, MASSACHUSE 'I-tl, ASSIGNQB 0 NATIONAL EQUIPMENT COMPANY, OF SPRINGFIEL'D, MASSACHUSETTS, A .eonrone'rrou or MASSACHUSETTS.

cements-MILL.

Specification of Letters Patent. Application filed August 11, IP11. Seria Ho- 848,529.

Patented Aug. 13, 1912.

To all whom it may concern:

Be it known that I, Aiioivzo LINTON BAUBMAN, a citizen of the United States of America, residing at Chicopee, in the county of Hampdcn and State of Massachusetts, have invented new and useful Improvemcnts in Grinding-Mills, of which the folterial treated will be destroyed.

It should be kept in mind that a mill not built to grind material such as chocolate, etc., can not be used for this purpose since the results would be to the highest degree unsatisfactory.

This invention embodies improvements over the apparatus disclosed in my co-pending application filed July 21, 1910, under Serial No. 573,125.

The object of this invention is to provide an apparatus which will grind materials such as chocolate, etc., in a uniform and reliable manner, and which will overcome many of the disadvantages of machines formerly used for the purpose.

Other obj ects-of the invention will appear in the detailed description and in the claims.

While the invention has for its special object the grindin of materials of a re strict/ed class, any eatures of the apparatus which are new and patent-able will be claimed in this, or other applications.

In the drawings forming part of this application,Figure 1 is a front view with part in section to better show the arrangement of certain details. Fig. 2 is an end view of certain parts which show the arrangement of the valve and pump operating mechanisms. Fi 3 is a top view of the apparatus assem led with a small part shown in section. Fig. 4 is a sectional view mm. Fig. 7 is a sectional view taken on line w-a:, Fig. 8, showing the valve controlling the ports of the feed pump and the inlet ports of the feed pipes, which mechanism is preferably contained in the 'same casing with the pump 27 as seen in Fig. 2. Fig. 8 is a sectional view taken on the line w-a:, Fig. 7, showing the arrangement of a valve rod with relation to the ports of the pump and the two separate feed pipes. Fig. 9 is a plan view of the essential parts of the apparatus all brought into one plane for the pur ose of showing the invention diagrammatically.

The invention can best be understood troman examination of Fig. 9 which shows in diagrammatic plan view the essential parts of the apparatus and the course through the apparatus of the material such as chocolate which is to be ground. It will be understood, however, that the a paratus whether" embodied in the speci 0 form shown or its equivalent is primarily designed to feed material, such as chocolate, to suitable grinding surfaces in a positively operating manner in which feeding operation the material is measured and then forced against the grinding surfaces which are designed to grind the material as fast as it is positively fed; and since it is positively delivered, the rinding surfaces are enabled to operate unormly.

In the drawings like reference characters refer to like parts throughout the several figures.

Referring to Fig. 9 a large quantity of chocolate is mixed or stored inthe vessel 1 which has a communicating passage 26 to distributing chamber 32, the parts of which are controlled by the valve rod u. It will be seen by following the course of the arrow in this figure that the chocolate flowing through the passage 26 enters at one side of the pump piston 33 operated by the piston rod t. By reciprocating the piston rod t and the valve rod to in a manner to be hereinafter described (but which is more or less obvious from an inspection of Fig. 9) .it will be seen that. the movement of the pump piston will draw in a measured quantity of chocolate on one side as it moves to the left storage chamber 2 at .thejsame time drawing t e chocolate in on the other side. This the pump cylinder with the passage 26 on one side of theiston and to connect the storage chamber is connected by continuation of the passage 3/ to one side of the rotating grinding disk 6. It will be understood that the chocolate is ound between the rotating grinding mem ere mounted between two stationary grinding members 9 and f. Inorder for the chocolate to take the course stated, it is necessary for the valve rod u to close the'communication of same side with t e passage This operation of the valve rod 1s hereinafter described together with the mechanism for bringing such operation about.

The passage 2 conducts chocolate from the other side of the pump piston to the other side of the rotating grm mg member a in a similar manner. The rotatin grinding member is keyed to a shaft which is driven from a pinion on a shaftJa in mesh with a gear 72. eyed on the shaft A. The shaft 70 is the driving shaft which is turned by a belt operating on a pulley 2' as indicated. The chocolate is, by the operation of-the pump, valve, and rotating grinding member, ground uniformly there being a definite quantit of chocolate positively fed first to one Sid of the rotating grinding member and then to the other. It would. be possible to feed to only one side of the grinding mechanism by stopping one inlet port of the pump with the improved results, but the duplex arrangement is preferred.

While the diagrammatic showing of the invention in Fig. 9 is fairly complete, the machine in its commercial form will now be described.

Supported on the base a are the uprights Z), c, and d which,together with the base a, form a supporting frame for the apparatus. The driving-wheel 2' is mounted in suitable bearings in the frame, and this wheel, by suitable gearing, as indicated in Fig. 2, drives the wheel 71. which is mounted on the v shaft A. The shaft A rotates in bearings A mounted in supports 1) and d.

Mounted on the shaft A. rotating in suit-- able bearings A is the eccentric m and the lever is reciprocated. At the same time the valve-stem is operated by means of the lever 7 which is pivotally mounted on the stationary frame, This lever gets its motion from osaaoa the ram n which operates between two rollers. as o, mounted on the link 9, which link two operate at the right time with respect to each other.

The hand-wheel 25 shown in Fi 2 is used to vary the motion transmitte from the main shaft to the piston-rod and thus vary the stroke of the piston by changing the position of the pin 8 in the slot in the link 5, as shown. This adjustment. is of primary importance, for one of the main difiiculties in grinding chocolate is to properly adjust the grinding surfaces. When this has once been done, it is most desirable to avoid an further adjustment. Further adjustment is avoided by regulating the feed in a most positive manner, which allows the original conditions to remain constant. By the feed-regulating means herein described,

a measured quantity of material is delivered to each grinding surface for a given movement of the rotating member.

The ratio of uantity delivered to the speed of the grinding surfaces may be changed by regulating the feeding means. When the proper ratio has been obtained, it ma be kept absolutely constant.

Iieferring to Fig 7 the chocolate, or similar material which is to be ground leaves the storage or mixing receptacle 1 (see Fig. 3) by passage 26, enters through the passage 8 andwhen the valve is in the position shown, it passes to the righthand port 9 and enters the pump cylinder. In this position of the valve the piston of the pump 27 would be traveling from right to left so that the chocolate would be driven from the pump through the left-hand port 9 to the chamber 3, and be drawn in through the.

right-hand port 9 to the pump cylinder. The pump piston therefore drives the chocolate out one port 9 while it sucks it through theother port 9 and the pump is full all the time. The chocolate is thus first forced through the opening ac into the chamber 3 (see Fig. 4) and then through the opening 2; to the chamber 2. This oper ation is continued as long asdesired.

It will be seen that the continued operation of the pump 27, as described, will force a measured quantity of chocolate first into the chamber 3 and then into the chamber 2,

,the quantity going into one chamber being positively measured and equal in volume to the quantity going into the other chamber.

, From the chambers 2 and 3, the chocolate is forced to the op osite sides of the grinding mill through t e pipes z and y respectively. It is important that the material fed to each side of the grinding mill by means of this apparatus be positively measured and exactly the same in amount.

It is plain that by the arrangement shown, the pressure of the fluid entering the mill will e the same on each side of the rotating grinding surfaces.

In- Fig. 1, the grinding mill is shown as consisting of two stationary members 7 and g and an intermediate rotating member, as e, the rotating member 6 having both of its faces provided with grinding surfaces, and the inner face of both members 1 and g being provided with grinding surfaces. The rotating members is mounted on the shaft A and is rotated with the shaft A. The spring 4 is provided for allowing the member fv to yield when necessary.

A suitable mounting is indicated. in the drawing which is simllar to the mounting shown and described in my co-pending application Serial No. 573,125.

The chocolate is fed to each side of the grinding mill, as described, and leaves the grinding mill at the circumference of the grinding surfaces in any suitable manner.

The pipes 2 and 11 indicate a temperature re ating system which it is necessary to use'm connection with a plicants invention, for as the chocolate is fed from the container 1 through the pipes of the apparatus, it must be ept heated so that it will flow freely to the grindin surfaces.

The grinding surfaces themselves must be cooled by suitable means so that the chocolate being ground will not become caked in the, Inlll and thus destroy the grinding surfaces and render the device inoperative until cleaned.

The pipes through which the chocolate passes are shown jacketed in the drawing, as are also the two stationary grinding members. It is thought that the drawing sufliciently discloses applicants temperature regulating system, and detailed description thereof is unnecessary.

It can be seen from Figs. 1, 2 and 9 that the shaft A mounted in bearings A is positively connected with the rotating member of the inding mill, with the controlling valve 0 the feed pump and with the piston rod of the feed pump, each carried by said pump 27. Thus it is clear that tooperate the apparatus successfully, a suit-able speed for the shaft A must be chosen. This speed must be chosen rimarily so that the rotating member e of the mill roper will have the right operation, The eed may then be controlled by regulating the link motions and after the a paratus has been once ositively regulate ,it will operate in a xed and certain manner.

It has been found by experiment that if the chocolate is fed to the grinding surfaces by a plump and branch pipe connections, that t each side ofthe mill, such as applicant shows. The reason for this seems to be that where the fluid is forced into a single pipe and ,led from that pipe through branches to the two sides of the grinding mill, even with the most careful designing, the pressure of the fluid will vary in the different pipes, and therefore one side of the mill will receive more material than the other. This makes an uneven operation and is most objectionable. By means of applicants apparatus, where a measured quantity of chocolate or other similar material is fed to each side of the mill in a positive manner, the operation must necessarily be equal and uniform on each side of the mill, and therefore the quantity of material which may be ground in a days operation is greatly increased, not only because the e fluid will not flow equally to y material is groundin a uniform manner but because the apparatus can be adjusted positively to ind the material in a certain way, and aving once started the apparatus working, the likelihood of stoppage for any cause is greatly diminished by applicants improvements.

The capacity of this apparatus for refining chocolate, that is the weight of chocolate delivered pei'hour, is greater than in any other known a paratus.

The capacity 0 the a paratus is controlled by the specific fee ing means, since the material refined is measured and forced through the mill in a ositive manner. The apparatus may thus e depended upon to d iver its full capacity every working day.

What I claim, is

1. In a grinding mill, two stationary grinding members, a rotatable grinding member mounted intermediate said stationary grinding members having a grinding surface on each side thereof, and uniformly operative means to positively and uniformly feed to each side of the rotating member material to be ground in exact equal portions under pressure.

2. In a chocolate grinding machine, the combination with mechanism having surfaces suitable for grinding chocolate, of a uniformly positively and successively operative feeding device comprising means to measure quantities of chocolate to be ground, to positively force said measured quantities successively into contact with the grinding surfaces to insure a uniform product therefrom. I

3. In'a chocolate grinding machine, the

combination with mechanism having surfaces suitable for grinding chocolate, of a uniformly positively and successively operativefeeding device comprising means to measure quantities of chocolate to be.

controlling mechanism-for said feeding device to control the capacity thereof to insure a product of the desired quality from said grinding surfaces. I

4;. In a vgrinding mill, means to grind chocolate comprising a rotatable member operating between two stationary members, a chocolate feeding device to feed the chocolate to each side of said rotatable 'member comprising a positively and uniformly operative feed device operating to first feed a measured quantity of chocolate toyone side of the rotatable member, and on t-he",next stroke to feed the same measured quantity of chocolate to the other side of therotatable i oaugeoa- K member to insure a uniform feed to the grinding means, and positivedriving means between the rotatable member and the feed device whereby the rotatable member operates in achosen capacity ratio with the feed device.

5. In a grinding mill, two stationary grinding members each having a grinding surface on one face, a rotatable grinding member mounted intermediate said stat-ion- 'both sides of the rotatable member comprising feeding mechanism to positively force to each side of the rotatable grinding member.

ALONZO LINTON BAUSMAN.

Witnesses FRANKLIN Gr. NEAL,

SYDNEY B. DE GoLrER.

anequal quantity of material for grinding ary grinding members and having a grind- V 

